CONFIG_SND_SOC_WM8731 (not configurable)

modulename: snd-soc-wm8731.ko

configname: CONFIG_SND_SOC_WM8731

Linux Kernel Configuration
└─>Device Drivers
└─>Sound
└─>Advanced Linux Sound Architecture
└─>System on Chip audio support
└─>SND_SOC_WM8731
In linux kernel since version 2.6.21.1 (release Date: 2007-04-27)  
source code:
sound/soc/codecs//